Previously, "nested" calendar property bags were unwrapped up to one
level. That is, this object:
{
calendar: {
// ...Temporal.Calendar methods
}
}
would not be considered to implement the Calendar protocol, but would have
its calendar property used instead, if it were passed to an API that
required a Calendar protocol object.
These nested property bags are no longer supported. Discussion:
https://github.com/tc39/proposal-temporal/issues/2104#issuecomment-1409549753
Corresponding normative PR:
https://github.com/tc39/proposal-temporal/pull/2485
Similar to the previous commits with property bags and time zones, there
are also some existing tests that use a Proxy to test the order of
observable operations which involve user code
passed in as part of a Temporal.TimeZone object. I am going to write
several more tests that do this, as well. This seems like a good thing to
put into TemporalHelpers, where it can be implemented consistently so that
we don't get discrepancies in which operations are tracked, or bugs due to
a Symbol-valued property.
Updates existing tests to use this helper.
